Denver Radon Mitigation

Radon Mitigation in Denver, CO

Colorado's health department reports that about half of Colorado homes have radon above the EPA action level of 4.0 pCi/L [3]. If your test came back high, or you've never tested, we'll connect you with a state-licensed Denver radon mitigation professional for a free estimate.

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Illustration of Denver-area homes with the snow-capped Front Range mountains behind them
Illustration

Why radon matters in Denver

Radon is a colorless, odorless radioactive gas that forms as uranium in soil and rock breaks down, then moves up into buildings [2]. EPA identifies radon as the leading cause of lung cancer among non-smokers and estimates it causes about 21,000 U.S. lung cancer deaths each year [1]. Denver County is in EPA Radon Zone 1, the highest-potential zone [4], but CDPHE stresses that levels vary home to home, so the only way to know is to test [2][3].

Radon mitigation

How sub-slab and crawl-space systems work and what an install involves.

Radon testing

Short-term vs. long-term tests, DIY kits and professional monitors.

Cost & insurance

Typical Colorado price ranges, insurance, and how long systems last.

Buying or selling

Radon during a Denver home inspection, and what to ask for.

What to expect

  1. Tell us about your home and any test result.
  2. A licensed mitigation professional contacts you to discuss your foundation and schedule an assessment.
  3. You get a written quote. Compare it with others; you're never obligated.
  4. After any installation, retest to confirm levels dropped. EPA recommends a follow-up test after mitigation [5].

Colorado requires anyone paid to measure or mitigate radon to hold a state radon professional license (HB21-1195, mandatory since July 1, 2022) [6][7]. Always verify a license on DORA's lookup before hiring.

Get a free radon estimate

By submitting, you agree to be contacted about your request by a licensed local radon professional. See our privacy note.

Sources

  1. EPA, A Citizen's Guide to Radon
  2. CDPHE, Understanding radon
  3. CDPHE, Half of Colorado homes have elevated radon levels (Jan 5, 2026)
  4. EPA, Map of Radon Zones
  5. EPA, Consumer's Guide to Radon Reduction
  6. Colorado HB21-1195, Regulation of Radon Professionals
  7. Colorado DORA, Radon Professionals program